全文获取类型
收费全文 | 19296篇 |
免费 | 1469篇 |
国内免费 | 53篇 |
专业分类
耳鼻咽喉 | 134篇 |
儿科学 | 662篇 |
妇产科学 | 495篇 |
基础医学 | 3004篇 |
口腔科学 | 247篇 |
临床医学 | 2209篇 |
内科学 | 3474篇 |
皮肤病学 | 443篇 |
神经病学 | 2192篇 |
特种医学 | 435篇 |
外科学 | 2423篇 |
综合类 | 91篇 |
一般理论 | 23篇 |
预防医学 | 2052篇 |
眼科学 | 318篇 |
药学 | 1136篇 |
中国医学 | 32篇 |
肿瘤学 | 1448篇 |
出版年
2024年 | 36篇 |
2023年 | 214篇 |
2022年 | 424篇 |
2021年 | 807篇 |
2020年 | 504篇 |
2019年 | 709篇 |
2018年 | 716篇 |
2017年 | 579篇 |
2016年 | 638篇 |
2015年 | 671篇 |
2014年 | 855篇 |
2013年 | 1177篇 |
2012年 | 1661篇 |
2011年 | 1646篇 |
2010年 | 766篇 |
2009年 | 732篇 |
2008年 | 1268篇 |
2007年 | 1221篇 |
2006年 | 1124篇 |
2005年 | 1076篇 |
2004年 | 999篇 |
2003年 | 856篇 |
2002年 | 747篇 |
2001年 | 147篇 |
2000年 | 95篇 |
1999年 | 118篇 |
1998年 | 131篇 |
1997年 | 116篇 |
1996年 | 76篇 |
1995年 | 74篇 |
1994年 | 57篇 |
1993年 | 48篇 |
1992年 | 52篇 |
1991年 | 45篇 |
1990年 | 32篇 |
1989年 | 35篇 |
1988年 | 32篇 |
1987年 | 42篇 |
1986年 | 29篇 |
1985年 | 28篇 |
1984年 | 29篇 |
1983年 | 27篇 |
1982年 | 29篇 |
1981年 | 21篇 |
1980年 | 22篇 |
1979年 | 14篇 |
1978年 | 10篇 |
1977年 | 12篇 |
1976年 | 10篇 |
1972年 | 6篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
Patient experience with, and use of, an electronic monitoring system to assess vaccination responses
Stuart S. Olmsted PhD John D. Grabenstein RPh PhD † Arvind K. Jain MS ‡ Nicole Lurie MD MSPH § 《Health expectations》2006,9(2):110-117
OBJECTIVE: To evaluate the user experience and acceptability of an electronic patient monitoring system. SETTING AND PARTICIPANTS: 822 Military and civilian personnel at a health clinic at a major US military headquarters used an Internet and telephone-based electronic monitoring system to report vaccination-site responses and symptoms after receiving the smallpox vaccination. Focus groups of vaccinees were conducted to help develop a survey about the experience that was distributed to 379 vaccinees (96% completion rate). RESULTS: Users of the electronic monitoring system reported that it was fast and easy to use and reported they would use a system like this again and recommend an electronic monitoring system to a friend or relative. Most users (84%) were comfortable with a physician tracking their vaccine reaction using their electronic reports, but only half (51%) were comfortable with eliminating the post-vaccination follow-up visit with their health-care provider based on their electronic reports. CONCLUSIONS: This electronic monitoring system was well received by vaccinees and allowed health-care providers to track the status of vaccinees. However, vaccinees were not comfortable replacing a physician visit with electronic monitoring, at least for the smallpox vaccination. A monitoring system like this may be useful in public health settings, such as mass vaccination or prophylaxis during a bioterrorism event, a pandemic influenza outbreak, or another public health emergency. 相似文献
12.
OBJECTIVES: The objectives of this randomised controlled study were to determine if pre-admission patient education affects post-operative pain levels, domiciliary self-care capacity and patient recall following a laparoscopic cholecystectomy (LC). Participants were randomised to receive the standard preadmission program (SP) or an individualised, education intervention (El). DESIGN: A pre-operative questionnaire was administered in the pre-admission clinic to determine participants' knowledge of LC and post-operative management. Telephone follow-up and post-operative questionnaire were conducted approximately 14 days post discharge. SETTING: Preadmission clinic of a Sydney, Australia, tertiary referral hospital. SAMPLE: Ninety-three elective LC patients. RESULTS: EI participants experienced lower pain levels and had significantly greater recall of provided information. However, no significant differences were found between the control and intervention groups for domiciliary self-care. CONCLUSION: Pre-admission education intervention helps reduce post-operative pain levels following LC and significantly increases patients' knowledge of self-care and complication management. 相似文献
13.
14.
15.
Nicole von Steinbüchel 《Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale》1998,123(1-2):220-233
The organization of the time frames for perceiving, generating, and updating information in the CNS has as of yet received
little attention despite its elementary character for human behavior. We investigated temporal epochs in perceiving, acting,
and updating in patients with anterior and posterior lesions of the left and right hemisphere, in patients with lesions in
the left hemisphere without aphasia, and in healthy controls. Three temporal ranges, 30, 300, and 3000 ms, were assessed with
different psychophysical paradigms. Prolongation of the temporal perception of order (30 ms) was most pronounced with left
posterior lesions, of repetitive action (300 ms) with left anterior lesions, and updating (3000 ms) with left and right anterior
lesions. Temporal deficits are group as well as parameter specific. Our results support the notion of coordinated coexistence
of different temporal mechanisms. 相似文献
16.
17.
Brian J Forbes Gil Binenbaum Jane C Edmond Nicole DeLarato Donna M McDonald-McGinn Elaine H Zackai 《Journal of AAPOS》2007,11(2):179-182
PURPOSE: To identify the ocular features of the chromosome 22q11.2 deletion syndrome and to provide ophthalmologic examination recommendations for affected patients. METHODS: Ocular abnormalities were evaluated prospectively in patients with 22q11.2 deletion at the Children's Hospital of Philadelphia between 1997 and 1999. RESULTS: Ninety patients with confirmed 22q11.2 deletion were examined. Posterior embryotoxon was found in 49%, tortuous retinal vessels in 34%, eyelid hooding in 20%, strabismus in 18%, ptosis in 4%, amblyopia in 4%, and tilted optic nerves in 1%. CONCLUSIONS: The high incidence of ocular conditions that can potentially affect visual development suggest that children with 22q11.2 deletion should undergo a comprehensive eye examination upon diagnosis of the condition with follow-up as indicated by the findings in each case. In addition, knowledge of the ocular findings, in conjunction with certain cardiac, otolaryngologic, immunologic, and other systemic findings, may alert physicians to the possibility of a chromosome 22q11.2 deletion. 相似文献
18.
Performance standards for toric soft contact lenses. 总被引:1,自引:0,他引:1
Jacqueline Tan Eric Papas Nicole Carnt Isabelle Jalbert Cheryl Skotnitsky Maki Shiobara Edward Lum Brien Holden 《Optometry and vision science》2007,84(5):422-428
PURPOSE: To simplify the clinical assessment of toric soft contact lens (TSCL) on-eye behavior by establishing a set of standard clinical evaluation techniques. The likely performance range expected among the TSCL wearing population was determined for a series of lens designs and acceptable performance standards indicated for each variable. METHODS: Four prism-ballast, two peri-ballast and one dynamic stabilization TSCL designs were each worn by groups of 20 subjects in a nondispensing study. After 20 min of lens wear, lenses were assessed, in right eyes only, for subjective comfort (100-point scale), lens mislocation (degrees deviation from vertical) and rotational recovery after deliberate 30 degrees mislocation (degrees/10 blinks). The percentage of lenses orienting within +/-10 degrees of target orientation (zero rotation) and the variability of orientation (standard deviation of mislocation) were also calculated for each lens group. RESULTS: Based on partitioning of the data distributions for each variable, performance was designated as excellent, acceptable or poor. Corresponding performance cut-offs were determined at > or =90, 89 to 80, and <80 for subjective comfort, < or =+/-6 degrees , +/-7 degrees to 10 degrees , and >+/-10 degrees for mislocation, >10 degrees /10 blinks, 10 degrees to 6 degrees /10 blinks, and <6 degrees /10 blinks for rotational recovery. For groups of wearers the appropriate cut-offs were > or =90%, 89 to 70%, and <70% of lenses orienting within +/-10 degrees of target orientation and <+/-6 degrees , +/-6 degrees to 10 degrees , and >+/-10 degrees for variability of orientation. CONCLUSION: Techniques suitable for the evaluation of TSCL clinical performance have been described and guidelines for the assessment of such lenses established. In the process, we have identified potential performance differences that may relate to variations in TSCL design. 相似文献
19.
Miriam Stewart Linda Reutter Edward Makwarimba Irving Rootman Deanna Williamson Kim Raine Doug Wilson Janet Fast Rhonda Love Sharon McFall Deana Shorten Nicole Letourneau Karen Hayward Jeff Masuda William Rutakumwa 《Revue canadienne de recherche en sciences infirmières》2005,37(3):104-131
Poverty influences health status, life expectancy, health behaviours, and use of health services. This study examined factors influencing the use of health-related services by people living in poverty. In the first phase, 199 impoverished users of health-related services in 2 large Canadian cities were interviewed by their peers. In the second phase, group interviews with people living in poverty (n = 52) were conducted. Data were analyzed using thematic content analysis. Diverse health-related services were used to meet basic and health needs, to maintain human contact, and to cope with life's challenges. Use of services depended on proximity, affordability, convenience, information, and providers' attitudes and behaviours. Use was impeded by inequities based on income status. To promote the health of people living in poverty, nurses and other health professionals can enhance the accessibility and quality of services, improve their interactions with people living in poverty, provide information about available programs, offer coordinated community-based services, collaborate with other sectors, and advocate for more equitable services and policies. 相似文献
20.
Digital nerve injuries in the hand are common and can result in significant impairment and functional restriction. Despite this, there is relatively little literature, particularly with respect to postoperative rehabilitation. Splinting after repair, purported to protect the repaired nerve from excessive stretch is still commonly used. Recent cadaveric studies indicate postoperative rehabilitation is not necessary with resection up to 2.5mm. A randomized controlled trial was therefore undertaken to determine whether splinting after isolated 5th degree digital nerve transection is in fact necessary. Twenty-six subjects were recruited over a two-year period and randomized to either three weeks of hand-based splinting or free active motion. ANCOVA indicated no differences in sensibility at six months between the two groups. Subjects also reported their greatest functional limitations were because of hyperesthesia. Although this study is underpowered, these limited results suggest splinting may not be required postoperatively. 相似文献